override → passing only icon and name occasionate a exception with some file extensions.

[Zeioth]

The opts

opts = {
  override = {
    default_icon = {
      icon = "<3"
      name = "default"
    },
  },
},

Cause error with some filetypes (.service extension, for example).

Removing the field name, or adding the field color from default_icon, solve the issue, so something might be going on there.

The code I use to display the icons, in case it is relevant:

-- nvim-web-devicons
local devicons_avail, devicons = pcall(require, "nvim-web-devicons")
if devicons_avail then
  cached_icon_provider = function(_bufname, _filetype, _buftype)
    local icon, color = devicons.get_icon_color(_bufname)
    if not color then
      icon, color = devicons.get_icon_color_by_filetype(_filetype, { default = _buftype == "" })
    end
    return icon, color
  end
  return cached_icon_provider(bufname, filetype, buftype)
end

[alex-courtis]

The override above is missing colours.

To see what icons and colours are being used, please execute :NvimWebDeviconsHiTest

To override the default icon, the best mechanism is the API e.g.

require("nvim-web-devicons").set_default_icon("<3", "#6d8086", 65)